How to delete cookies in php

How to delete cookies in php: 1. Set the cookie value to empty, and the statement is "setcookie('cookiename', '') or setcookie(cookiename, NULL);"; 2. Expire the cookie The time is set to "past".

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Two methods for deleting/clearing cookies in php

php knows that there are two ways to use cookies. The first method is to set the cookie value to empty. The second method is to directly set the cookie expiration time to the past. This article introduces php to you. For examples of deleting cookies through these two methods, friends in need can refer to them.

Two ways to delete/clear cookies in php

Set the cookie value to empty, that is: setcookie('cookiename', '') or setcookie(cookiename, NULL);

Set the cookie expiration time to the past, that is: setcookie('cookiename','',time()-3600);

Method 1: Set the cookie value Set to empty

<?php
setcookie ( "cookie_user", "test", time () + 60 * 60 * 24 * 30 );
setcookie ( "cookie_pass", md5 ( "test" ), time () + 60 * 60 * 24 * 30 );
function logout() {
  setcookie ( "cookie_user", "", time () + 60 * 60 * 24 * 30 );
  setcookie ( "cookie_pass", "", time () + 60 * 60 * 24 * 30 );
}
/* http://www.manongjc.com/article/1253.html */
logout ();
echo $_COOKIE [&#39;cookie_user&#39;] . "<br />";
echo "You have successfully logged out.";
?>

Second method: Set the cookie expiration time to the past

<?php
setcookie ( "cookie_user", "test", time () + 60 * 60 * 24 * 30 );
setcookie ( "cookie_pass", md5 ( "test" ), time () + 60 * 60 * 24 * 30 );
function logout() {
  setcookie ( "cookie_user", "test", time () - 100 );
  setcookie ( "cookie_pass", md5 ( "test" ), time () - 100 );
}
logout ();
echo $_COOKIE [&#39;cookie_user&#39;] . "<br />";
echo "You have successfully logged out.";
?>

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